added check for 1D manifold
- added a switch to fix case of 1D/2D manifold interpolation in 1D/2D space.
This issue arise, for instance in 2D, when the following command is used
FieldConvert -m interppoints:fromxml=mesh.xml:fromfld=field.fld:line=X0,Y0,X1,Y1 wall.dat
- additionally it has been fixed the segment interpolation for the case when a point lies outside the element
- added check for dimensions of out field
- added regression test for line interpolation in 2D